function loginCheck(pageObj) {
	if (pageObj.onLoad) {
		let _onLoad = pageObj.onLoad;
		pageObj.onLoad = function (options) {
			if(wx.getStorageSync('USERID')) {
				//获取页面实例，防止this劫持
				let currentInstance = getPageInstance();
				_onLoad.call(currentInstance, options);
			} else {
				//未登录时，跳转到登录页
				wx.redirectTo({
					url: "/pages/login/login"
				});
			}
		}
	}
	return pageObj;
}

function getPageInstance() {
	var pages = getCurrentPages();
	return pages[pages.length-1];
}

exports.loginCheck = loginCheck;